列方程并解答 买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买列方程并解答买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买了多少米?

列方程并解答 买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买列方程并解答买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买了多少米? 买两种布料共138m,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?（方程解答） 买两种布料共138米,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?要列方程, 买两种布料共138M,花了540元,其中蓝布料每米3元,黑布料每米5元.两种布料各买了多少米?用一元一次方程解答~ 买两种布料共138m,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?（用方程解） 买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布各料多少元? 买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布各料多少元? 买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米? 买两种布料共138m,花了540元,其中蓝布料每米5元,黑布料每米3元,两种布料各买了多少米? 买两种布料共138m,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?(要式子、要答案.) 买两种布料共138米,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料共多少米? 买两种布料共138m,花了540元,蓝布料每米3元,黑的每米5元,两种各买了几米 列方程并解答 列方程 并解答 列方程并解答 列方程并解答 买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米? 在俄罗斯小说家契柯夫写了这样一道买布的数学问题,请你用方程方法解答.顾客用540卢布买了两种布料共138俄尺,其中蓝布料每俄尺3卢布,黑布料每俄尺5卢布.其中蓝布料每俄尺3卢布,黑布料每